Ignition apparatus



A. ERICKSON.

IGNITION APPARATUS.

APPLICATION FILED NOV. I9, I919.

1,401,058, Patented Dec. 20,- 1921.

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ALBERT ERICKSON, OF CHICAGO, ILLINCIS, ASSIGNGR, TO SPLITDOBF ELECTRICAL COMPANY, 01* NEWARK, NEW JERSEY.

IGNITION APPARATUS.

Application filed November 19, 1919. Serial No. 339,081.

To all whom it may concern:

Be it known that I, ALBERT ERICKSON, citizen of the United States, residing at Chi cago, in the county ofGook, State of lllinois, have invented certain new, and useful Improvements in Ignition Apparatus, of which the following is a description, reference being had to the accompanying drawing and to the figures or" reference marked thereon.

My invention relates to ignition apparatus in which the ignition generator is of the oscillating type and which supplies current to electrodes in an engine cylinder, one of which is adapted to be moved to introduce a spark gap substantially co-incidcnt with the time of generation of maximum current by the ignition generator.

It is the principal object of my invention to provide a generator which will deliver its maximum current at a suitable time with reference to the position of the engine pis ton. In magnetos of the oscillating type with which I am familiar no good means have been provided for advancing the time of producing maximum current from the generator after the engine has been started.

It is the usual practice to start a station-.

ary engine with the spark occurring beyond dead center; that i to say, in retard position.

Certain attempts have been made to shift the position of the spark after the engine has been started manually but on account of the method of connection of an oscillating type magneto to the engine, it is not easy to do this automatically. It is, therefore, another object of my invention to provide a simple, inexpensive means of advancing the spark automatically after the engine has been started. 7

Other and further obj ectg will be apparent to one skilled in the art after a study of the specification and the annexed drawings, wherein Figure 1 is a view of a portion of the engine showing an engine driven member in operative relationship to the ignition generator.

Fig. 2 is a partial view of the ignition generator and certain engine members.

In the drawings, 1 illustrates an engine driven member which, in the case at hand, is the cam shaft gear mounted adjacent the flywheel 2, 3 being a governor associated Specification of Letters Patent. Patented D80. 20, 1921. a

with the parts 1 and 2 for governing the These electrodes are not 'shownas they form no part of my invention and are Well understoodin their construction and operation and will, therefore, not be referred to in detail herein. The generator 5 has a shaft 7 which operates a rotatablemember for the generation of electrical current. to the shaft 7 is a trip lever 8. Associated with the trip lever 8' are prings 9, having one end attached to an arm of the trip lever and the other end attached to a suitable bearing 10, preterably carried on a bracket 11 fastened to the ignition generator. Carried on the engine driven member 1 is a cam member-12, the same being preferably supported on a, pivotal bearing .13. A stop pin 1% limits the movement of the member12 in one direction andthe pin 15 limits its movement in the opposite direc tion. A pawl 16 is pivotally carried on the member l by pivot screw 17. The pawl 16 has a nose 18 adapted to engage the notch 19 in the member 12 when the pawl. has moved to the dotted position indicated at 20, the member 12 then being in the position shown by dotted lines21. In operation, when the engineis being started the member 12 is in the position shown in full lines in 1 and as the member 1 turns in the direction o'tthe arrow, the cam member 12will act on the trip lever 8 to move the rotatable member of the generator 5 to a position which will tension the spring 9 and when the rotation of member 1 has proceeded far enough the trip member 8 will slip over the nose of the cam 12 and" the springs 9 will rapidly return Fastened the rotatable member of the generator ,5 to

normal position, generatinga relativelyheavy current in the winding of the generator which current will be conveyed by'conductor 6 to the spark plug or sparking electrodes will engage the'notch 19 thereby holdingthe cam member 12 inadvanced position until the engine speed has droppedto a point considerably below normal.

It will be seen that l have provided a very simple and inexpensive mechanism to do this Work and it will be apparent that vari- 011s changesmay bemade in the details Without departing from the spirit of my invention and the scope of the appended claims.

Havingthus described my invention, what I claim is 1; An ignition generator for internal corn- 7 bustion engines, having a rotatable member for the generationofelectric current, an oscillatory member secured thereto, rotary nonoscillatory means on the engine tor .1n-

termittently engaging and moving said oscillatory member through a portion of; a

"revolution and then releasing it, means for V returning the oscillatory member tonor'mal positionattersaidrelease occurs, and means including a Weighted pawl on saidengine torautomatically advancing said engine 00-- operating means for the purpose described. 2. An ignition generator for mternalconr bustion engines, having a rotatable member for the generation of electriccurrent, an

osc llatory member secured thereto, rotary non-oscillatory means on the engine for intermittently moving said oscillatory member through a portionof a revolution and'then releasing it, means'for returning thGfOSCIllQ- tory member to normal position after said releaseoccurs, and means including a Weight ed pawl on said engine for automatically advancing said engine cooperating means 7 and holding said cooperating means in adj the engine;

vanced position during normal running of 8. In combinationan ignition generator for internal combustion engines having a rotatable member for thegeneration of electric current, an oscillatory trip lever fastened to said rotatable member for rotating the same, a rotary non-oscillatory engine driven memher, a member for intermittently engaging andactuating the trip lever carried onsaid' .engine driven member, spring associated V trip lever pivotally mounted on the engine driven-member, springs associated with said trip lever set llIldQIItSHSlOIl by movement thereof, for quickly returning said trip lever and rotatable member after said trip lever has been released by said cam and a pawl. carried on the engine member responsive to centrifugal force for'moving the cam memher to advanced position after the engine has been started.

5. In combination an ignition generator for internal combustion engines having a 1'0- tatable member for the gene'rationot electric current, a trip lever tastenedto said rota table member "for rotating the same, an engine driven member, a cam-for actuating the trip lever pivotally mounted on the engine driven member, springs associated With said trip lever set under tension by movement thereof, for quickly returning said trip lever and rotatable member after said-trip lever has been released by said cam and a pawl pivotally mountedon the engine memberresponsive to centrifugal force provided With means-tor automatically moving the cam to advance position after the e'nginehas been started and for permitting thecam toretnrn to retard position at a predetermined lovv'speed of the engine.

6. in an ign tlon system, the combination of, anoscillating type of electric generator comprising a trip lever attached to the rota table member of the generator and having sprin s for producing quickimpulse of the rotata'ele member after, displacement and release thereof by the trip finger, a rotary noneoscillatory engine operated cam for actuating the trip lever and means responsive to the speed oi. the engine for a vancing and holding the cam iii an advance posltion durmg normal running of the engine.

7. In combination, an ignitlon generator .tor internal combus tion engines having rotatable member for the generation of electric current,a trip lever fastened to saidrotatable' member for rotating thesame, an engine'driven'member, a cam for actuating the trip lever pivotally mounted on the engine driven member, springs associated With said trip lever set under tension'by move ment lever thereof, for quickly returning saidtrip and rotatable member after saidtrlp jlever has been releasedby said cam,a centrifugally' responsive pavvl pivotally mounted on the engine member and coiiperati-vc means on the pawl and cam member for 'moving the cam member to spark advanced v position and for holding the cam member in such position, when the engine driven member has attained a predetermined angular velocity. j

In testimony whereof, I itillli my signature.

' 1 ALBERTERIGKSQN. 

